Disorder in Multi-Band Topological Semimetals

Explore the intricacies of "Disorder" in Multi-Band topological Semimetals in this informative lecture by Jacob Gayles from the University of South Florida. Delve into the world of topological magnetic semimetals, such as Co3Sn2S2 and Co2MnGa, and their exotic transport properties, including large intrinsic anomalous Hall effect (AHE) due to uncompensated Berry curvature. Examine the two-band model by Lu et al., which demonstrates AHE maximization near Weyl crossings. Investigate real systems with perturbative disorder in alloying, 2D planes, and magnetic order parameters, comparing theoretical predictions to experimental results. Focus on the highly symmetric XPt3 compounds and their anti-crossing gapped nodal lines, which drive intrinsic Berry curvature Hall effects. Learn about the CrPt3 compound, its impressive AHE of 1965 S/cm calculated through first-principle electronic structure, and the experimental validation using high-quality thin films grown by magnetron sputtering. Discover the potential of these materials for integration into topological devices and gain insights into the latest advancements in the field of topological semimetals.

Jacob Gayles, University of South Florida, USA: “Disorder” in Multi-Band topological Semimetals